“There is a ’10/90 Rule’ in life. This rule says that the first 10 percent of time that you invest in finding out the underlying laws, principles, rules, methods, and techniques of successful action in any field will save you 90 percent of the time and effort required to achieve your goals in that area.

Over the years, I have found that the smartest people are those who take the time to find out the rules of success in any area before they attempt to get results in that area. They do their homework in advance.”

Brian Tracy, 2002, The 100 Absolutely Unbreakable Laws of Business Success.